HXSJ T32 Ergonomic Design 2.4G Wireless Vertical Mouse Features: 1. Can be a key control: power switch. 2. Enjoy 2.4G wireless technology, office casual games applicable. 3. Innovative aluminum side roller design. 4. Vertical side horizontal operation design, bid farewell to the "mouse hand". 5. Wireless receiver, can be received within 10 meters of wireless. Specifications: Brand: HXSJ Vertical mouse Model: T32 Color Classification: Black Silver Wireless technology: 2.4GHz Wireless distance: 10m Micro switch life: 10 million times Number of keys: 6 keys Battery type: 1 x AA batteries (not included) Work: Photoelectric Product weight:93g Item size: 12.5x8x5.5cm Packing weight: 125g Package Size:12.5x9.3x6.5cm Rated voltage current: 1.5V5mA Four-speed DPI switching: 800-1600-2400-3600DPI System Requirements: Windows 98Me2000XPVistaWin 7Win8win10 or latest. Package includes: 1 x Mouse 1 x USB Receiver 1 x English User Manual Three-level power saving mode: 1. Three seconds into the first sleep light flashing continuously 2. 1 minute or so to enter the secondary sleep, intermittent flashing lights 3. 8 minutes or so, go to level 3 sleep, the light goes out How to use: 1. Open the battery cover and remove the micro. 2. Receiver installed on the bottom of the mouse. 3. Plug the receiver into your computer free USB port.